The use of data from land titles offices means that there are significant lags between the time when sales occur and when a reliable median of those prices can be estimated. (rba.gov.au)
Any person has the right to sold data as well as Title data on any property via land titles offices. (remonline.com)
As noted above, most house price data are obtained from land titles offices, with prices recorded as at the time of settlement. (rba.gov.au)